Operation And Use Of Controls; Main Switch (S1); Adjustment Of Welding Voltage; Pilot Lamps - Kemppi 3200 Operating Manual

2.5

OperatiOn and use OF COntrOls

See the page for Kempoweld PANELS and COOLING UNIT.

2.5.1 main switch (s1)

In zero position all control and welding current circuits of the equipment are dead (without
voltage). In position I the control circuits of the machine become live (get voltage). The
primary and welding circuits are dead, if the welding mode has not been started with the gun
trigger.
Always switch on and switch off the machine from the main switch. Never use the mains
NOTE!
plug for switching on or switching off the units and equipment!

2.5.2 adjustment of welding voltage,

table of adjustments, switch positions:
coarse control fine control
1 / 4 1 / 10 – 10 / 10
2 / 4 1 / 10 – 10 / 10
3 / 4 1 / 10 – 10 / 10
4 / 4 1 / 10 – 10 / 10
The welding voltage is adjusted with two turn switches. The S2 is the 4-step switch for coarse
control, where voltage value of each step can be fine-adjusted with the 10-step switch S3.

2.5.3 pilot lamps

pilot lamps of the machine report about electric function:
The green pilot lamp H1 indicating that the machine is ready for operation is always lit, when
the machine is connected to mains voltage and the main switch is on position I.
The yellow pilot lamp H2 is lit, when thermal protection of the welding circuit has released
due to overheating. The protection releases if the power source is continuously loaded over
rated values or the cooling air circulation has been obstructed.

2.5.4 Control fuse (F1)

On the rear plate of the power source the fuse (F1) 8 A delayed is the short-circuit protection.
Use the fuse size and type according to markings. Damage caused by a wrong type fuse is not
covered by the guarantee. If the fuse is blowing again, send the unit to service.

2.5.5 adjustment for arc roughness

Arc roughness is adjusted by connecting the return current cable to the applicable one of the
two dix-connectors on the front plate.
The connector marked with shorter symbol gives a rougher arc, which is used for welding
of thin sheets and ferrous metals by 0.6 – 1.0 mm wires and especially with CO ² shielding
gas. The connector marked with longer symbol is suitable for thicker wires and especially for
aluminium and stainless materials. The most suitable roughness is, however, most dependent
on the welding case. You will find the best position by testing the different positions.

2.5.6 Operation of cooling fan

The cooling fan on the rear plate of the Kempoweld 3200 equipment is started and stopped
according to use. The cooling fan is controlled by the gun trigger and control circuits. The
cooling fan is started after ca. 15 s after weld start and stopped after ca. 10 min after weld end
or release of the overheat protection.
Do not switch off the unit with the main switch before the cooling fan has automatically
NOTE!
stopped. By open circuit the cooling fan does not get started.
open circuit voltage
15.5 – 18.2 V
18.6 – 22.5 V
23.1 – 29.3 V
30.4 – 41.6 V
EN
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